Muffler Heat Shield Interfering With Reinstallation

2017 Bonneville T120. Took the mufflers off because I had a flat I needed to get fixed, and now the heat shield from the header pipe is interfering with reinstallation: I can't get the clamp to both go over the muffler and under the heat shield.

Any ideas? I really don't want to have to trailer the bike to a mechanic for something stupid like this.